Disk habrow



S. V. DAVIN.

DISK HARROW. APPLICATION FILED APR.. 191s.

Patented Dec. 16, 1919.

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DISK HARR'0w., APPLICATION FILED APR. 3.4 918.

Patented Dec. 16, 1919.

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DISK HARROW.

APPLICATION FILED, APR. 3. 19m.

' Patented Dec. 16,1919.

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SERAPHIN V. DAVIN, OF WALLA WALLA, WASHINGTON.

DISK HARROW.

Specification of Letters Patent.

Application filed April 3, 1918. Serial No. 226,388..

that greater strength, rigidity, durability.

and effectiveness is obtained.

In order that this invention may be better understood reference is had to the accompanying drawings in which:

Figure 1 is a plan view of the harrow;

Fig. 2 is a side elevation;

Fig. 3 is an enlarged rear elevation showing the adjuster with part of the beam in r section;

Fig. 6 is a side elevation of the. support the frame and held at the proper distancetherefrom by spacing sleeves 16 are guide bars 17, and between the guide bars and the side bars of the frame are mounted beams 18; said beams being pivoted near one end and free. to move in a horizontal plane about the axis of the pivot which consists of a bolt 19 and spacing sleeve 16. In addition to the above movement, one or both beams may be arranged to have a lateral movement, as will hereafter be explained.

Cleaner bars are provided consisting of strips 20 placed parallel with the beams and supported by projecting pieces 21 which are bolted to the beams, these pieces being of a length sufiicient to hold the strip below the guide bars so that free movement, with relation to the guide bars, may be had, and the cleaner bars proper 22 bolted to the strips 20 and extending downward at an angle and resting against the rearward side of the disk axle 23 and close to the cutting edge of the disks 24.

By means of the cleaner bars the disks are continually cleaned of mud or weeds and thus aremore effective.

To the under side of the beams pedestal bearings 25, inverted, are attached, in which the disk shaft 26 is revolubly mounted. The pedestal or post of these hearings is hollow,

27, and serves as a reservoir for oil, ingress being through a hole 28 provided for that purpose in the beams and registering with a corresponding hole 29 in the cast head of the pedestal, and egress being through a small hole 30 in the base which registers with a corresponding hole 31 in the bearing material. This bearing material consists of 7 wooden blocks 32 bored to receive the shaft 26 and of a length to project beyond the cap 33 of the box, the ends thereof acting as thrust bearings against the disks, thus the, wear comes on the wood, which is most effective. The blocks 32 are split horizontally that they may be readily placed on the shaft 26 and are held in place by the cap 33 and bolts 34.

On the base of the bearings are hooks 35 held in. place by the above mentioned bolts (the hooks may be cast integral with the bearing if desired), the purpose of which will be presently explaine On the front end of the frame and slightly below its level is the draft bar 36 which is suitably-supported by the bent piece 37 and the guide bars 17 extended and bent to re+ ceive the lower side of said draft bar. On the inner or rear side of this bar, and suitably attached thereto are hooks similar to, and in line with, the above mentioned hooks 35 on the bearings 25.

By referring to Fig. 3 it will be noted that the disk shaft 26 is located considerably below the frame and as the pull ison the frame the beams 18 have a twisting tendency which would spring the guide bars 17.

To prevent this the hooks are suitably attached to the rear. of the draft bar 36, on both the front and rear of the forward pedestal bearing and ,the front of the rearward pedestal bearing, and supporting mem hers 38. which may consist of chain or other means. attached to said hooks. That hori- 116 complished conveniently the supporting in the adjusting bar, and the hand lever nut 4.9. Beam 18 is also slotted at to provide members 38 are arranged to be disconnected from the hooks 35, the proper adjustment is then made and the supporting members reconnected. Thus absolute rigidity of the disks is maintained.

Any suitable draft device may be applied to the draft bar.

0n top of the side bar 11 is located an adjuster 39 by means of which a lateral movement to the beams is obtained.

This adjuster swings with the beam 18. and upon its-pivot and consists of a plate t0, operating lever a1 and adjustingbar d2. The plate is attached to the side bar 11 by means of the aforementioned pivot and extends horizontally and in line with the beam. The plate is suitably provided with lugs -l3 to which are pivotally attached the operating lever 41 and adjusting bar i2 respec tively. T he operating lever projects downward through a slot at in the. plate and engages the beam through a slot t5 therein with which the tongue 46 of the operating lever registers. The operating lever being held rigidly in the required position by means of the bolt H, which passes through the operating lever and through the slot sLS for the lateral movement.

It will now be seen that by moving the operating lever the beam, and withit the disks, are moved laterally and thus tracking is prevented, also that greater movement of the beams about the pivot may be obtained as when the disks are drawn apart at one end the other ends close toward each other they might otherwise have a tendency to rub, whereas a slight movement of the ad justing lever places the disks in the best operable position and prevents rubbing.

Q11 the extreme outer end of the rearward disk axle is placed a disk 51 having a smaller diameter which acts as a marker and guide for subsequent work.

The horizontal movement of the disk beams is obtained by means of the lever and con: necting rods 53; as this forms no part of my invention further explanation is deemed unnecessary.

With the above specification in mind it will now be noted that this disk harrow is esaeee uniform and by perfect rigidity the harrow,

is made more lasting and the work is accomplished with less labor. v

Having thus described my invention,

1 claim:

1. In a disk harrow,.a frame, a forward 7 beam pivotally attached at one end to the frame, a rearward beam pivotally and slidably attached at one end to the frame, pedestal bearings attached to said beams intermediate the ends thereof, shafts revolubly mounted in said bearings, and disks carried by the shafts.

2.,In a disk harrow, a frame, a forward beam pivotally attached at one end to the frame, a rearward beam pivotally and slidably attached at one end to the frame, a laterally operating means pivotally mounted on the frame and engaging the said last mentioned beam, pedestal bearings attached to said beams, intermediate the ends thereof, shafts revolubly mounted in said bearings, and disks carried by the shafts.

3. In a disk harrovv, a frame, a forward beam pivotally attached at one end to the frame, a rearward beam pivotally and slidably attached at one end to the frame, pedestal bearings attached to said beams, hooks carried by said bearings, shafts revolubly mounted in said bearings, disks carried by the shafts, a draft bar attached to the frame, adjustable supporting members attached to the draft bar and engaging hooks on the forward bearings, and adjustable supporting members engaging hooks on the forward bearings and extending to and engaging hooks of the rearward hearings.

4:. In a disk harrow, a frame, a. forward beam pivotally attached at one end to the frame, a rearward beam pivot-ally and slid ably attached at one end to the frame, and disk revolubly supported by the beams, substantially as described.

In testimony whereof I have athxed my signature.

SERAPHIN V. Dir VIN. 

